Hydraulic rotary power transmitter



@Si 27 3933E- W. W. BAKER g HYDRAULIC ROTARY POWER TRANSMITTER Filed June 14, 1928 3 Sheets-Sheec l Cm@ :uns M 3&2 o La al@ 41o M v J@ l? 3@ 3@ Z0 g; (5 m @w/ j '/5 L l 'I (i l [W7-1 Jil) VPH- INVENTOR.

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Patented @ein 27, 193i @FFHQE 'WILLIAM W. BAKER, 0F CINCINNATI, OHIO HYDRAULIC ROTARY POWER TRANSMITTER Application filed June 14, 1928. Serial No. 285,469.

My invention relates to `means for hydraulic transmission of power.

Heretofore power has been transmitted by means of clutches, belts and chains and the mechanism necessary in these instances will in time become badly worn and require to be repaired or replaced, especially if they are not properly lubricated at all times.

The objects of my invention are to rolo vide simple, eiiicient, economical, convenient, safe and easily operated means whereby ower may be hydraulically transmitted rom a rotating member, such as a driving shaft, to an idle member, lsuch as a shaft to be driven.

My invention consists of a gear pump suitably mounted in a housing, which housing acts as a y-wheel, and suitable connections associated with said pump and housing whereby` an idle shaft can be operatively connected to a rotary shaft and means whereby the idle shaft is caused to gradually or progressively move with said rotary shaft until a direct connection between said shafts is effected.

My invention further consists in the construction, combination, location and arrangement of parts, as herein set forth and claimed,

In order that the principles of my invention, as well as its constructional features, including the manner of its embodiment may be readily understood, I have, in the accompanying drawings, illustrated diierent exempliiications of the same as a basis for a description thereof. It will be readily apparent that the invention is capable of modified application; therefore the drawings and description are to be taken in an illustrative, and not in a limiting, sense.

In the drawings:

Fig. 1 is a cross-sectional view taken on a plane corresponding to line 1-1 of Fig. 6;

Fig. 2 is a plan view of one of the sliding valves;

Fig. 3 is an edge view thereof Fig. 4 is a plan view of one of the valve bushings 5` l Fig. 5 1s an edge view thereof;

Fig. 6 is a central longitudinal section of the invention taken on line 6-6 of Fig. 15;

Fig. 7 is a detail view of the shifting yoke;

Fig. 8 is a detail view of the sliding sleeve;

Fig. 9 is an isometric detail view of one of the forked links 34;

Fig.- 10 is an isometric view of one of the links 53;

Fig. 11 is an isometric detail view of one of the links Fig. 12 is an isometric detail view of one of the valve crank arms 26;

Fig. 13 is an isometric detail view of one of the valve arms 31;

Fig. 14 is an isometric detail view of one of the valve arm nibs 33; and

Fig. 15 is a rear elevation of the invention, part of the housing cover plate being broken away.

In the embodiment of my invention as illustrated and which shows la preferred construction I provide a housing 1, preferably cast in one piece, and comprising outer wall 2, gear receiving chambers 3, 4 and 5, respectively, which chambers are centrally located within central body portion 6, which body portion is formed integral with the housing 1. The ends 7 of portion 6 are spaced apart from the inner peripheral surface 8 of wall 2 and valve guideways 9 extend lengthwise of said body portion, as clearly illustrated in Figs. 1 and 15. Passageway 10 extends crosswise of body portion 6 and intersects gear chambers 3 and 4 and walls 11 and 12, respectively. Passage 13 extends crosswise of body portion 6 and intersects gear chambers 4 and 5 and walls 11 and 12, as clearly illustrated in the sectional view, Fig. 1. The valve guideways ,9 are formed by the space left between the body portion 6 and the inac ner sides of walls 11 and 12. Valve bushings 14 (Figs. 4 and 5) are provided with openings 15 and 16, said openings being adapted to aline with passageways 13 and 10, respectively (Fig. 1). The sliding valves, a5 designated 17, (Figs. 2 and 3) are each provided with openings 18 and 19 therethrough and cut-out or notch 20 on the edge thereof. Wall 11 is provided with hole 21 (Fig. 1) which is in alinement with passageway 13 l and is also provided with inlet passage 22, the inner end of which is in alinement with passageway 10. Wall 12 is provided with a hole 23, which is in alinement with passageway 10 and said wall is also provided with inlet passage 24, the inner end of which is in alinement with passageway 13. Said walls l1 and 12 are further provided with slots 25 (Figs. 1 and 15) for the purpose of receiving valve crank arms 26.

The free ends of arms 26 (Fig. 12) are received by notches 20 in sliding valves 17 and the other ends of said arms are securely attached to short shafts 27 by pins 28 (Fig. 1). The short shafts 27 are received by holes 29 in housing cover plate 30 (Fig. 6) and the outer ends of said shafts are securely fixed to arms 3l by pins l32. Nibs 33 are pivotally mounted upon the outer ends of arms 31 and are pivotally received by the forked or bifurcated ends of links 34. Gears 35 and 36 are rotatably mounted upon shafts 37 and 38 and are inserted within gear receiving chambers 3 and 5, respectively, as clearly shown in Fig. 1. One end of shaft 39 is rotatably mounted in bearing 40 (the latter being carried by housing cover plate 3() (Fig. 6) and held-therein by plate 41) and is provided with a gear 42, which gear is inserted within gear receiving chamber 4 and in permanent mesh with gears 35 and 36, respectively. As an additional support for the gear 424within housing 1, a bearing 43 is placed within the recess 44 of said gear and a short shaft 45 is jointly received byv said bearing and a socket 46 formed on the inner face of wall 47. A tubular sleeve 48 (Figs. 6 and 8) is slidabl mounted upon shaft 39 and one end thereo is provided with external threads 48a, while the remaining end has two pairs of oppositely disposed ears or lugs 486. Said sleeve is also provided with an annular rib orflange 48o on its outer periphery and midway said threads 48a and ears 485. A circular dise 48d, having a hole in the center thereof, is received over the sleeve 48 and is adapted to be tightly wedged against said rib 480 by ring nut 48e, as clearly illustrated in Fig. 6. A shifting yoke 49 (Figs. 7 and 15) having oppositely disposed nibs 49a on its outer periphery, 1s adapted to be held against ball-bearings 50 by ring nut 51, said bearings being disposed on opposite sides of said disc 48d and between the ring nutl 51 and yoke 49.

The plate 41 has lugs 41a'I oppositely disposed on its outer face, as clearly shown iin Fig. 6, for the purpose of receiving link connecting pins 52. A pair of links 53 straddle each of the lugs 41a and are pivotally connected thereto by said pins 52. One end of each of the links 34 is also pivotally attached between the pairs of links 53, respectively, by link connecting pins 54. The links 53 are pivotally connected to ears 485 (or tubular sleeve 48)v by short links 55 and pins 56.

The housing 1 is provided with an oil filler plug 64 whereby the interior or available space within said housing can be filled with a. light lubricating oil.

The operation of my invention is as follows:

Assume that Vthe housing 1 is attached to the crank shaft 59 of a motor (not shown) that said motor is running; and that the sliding valves 17 are in the open position shown in Fig. 1. With the Valves in this position the housing 1 is rotated with the crank shaft 59 (and at the same speed or R. P. M. of the motor) and the gears 35-36 move around the gear 42 as the latter gear and shaft 39 remain idle when the valves 17 are opened. Then assume that the` tubular sleeve 48 is moved outward upon shaft 39, or in a. direc- `tion away from cover plate 30. This movement of said sleeve gives a movement to the sliding Valves 17 within guideways 9, through the linked connection of links 55-53, lugs 41a, links 34, nibs 33, arms 31, shafts 27 and valve crank arms 26. When the valves 17 are gradually moved to close both ends of the passages 10 and 13, respectively, the oil flow through said passages 10 and 13 is gradually trapped within said passages and gear chambers 3, 4 and 5, respectively. As shown in Fig. 2, the opening 18 in valve 17 is of a smaller area than the opening 19 in said valve and said opening 18 represents the'outlet opening and 19 represents the inlet opening. With the outlet opening 18 thus of' a smaller area than the inlet opening 19 the trapping of the oil within the gearchambers 3, 4 and 5 and passages 10 and 13, re-

spectively, is brought about gradually so that a smooth connection fis effected between the crank shaft 59 and the driven shaft 39. It will, therefore, be readily apparent that as the oil is graduallytrapped within the passages 10 and 13 and the gear chambers 3, 4 and 5, respectively, motion is gradually, and without shook or jar, imparted to gear 42 and shaft 39. When the valves 17 are fully closed and the oil trapped within gear chambers 3, 4 and 5 and passages 10 and 13, respectively, the gears 35, 36 and 42 are held in locked relation relative to each other, thus causing the shaft 39 to be directly driven from crank shaft 59. Should it be desired to change the P. M., or speed of shaft 39, or, in other words, reduce the speed relative to crank shaft 59, simply manipulate the sliding valves 17 until a portion of the openings 18 and 19 in said valves uncover a portion of ,the passages l0 and 13, respectively.

Whenthe valves 17 are fully opened, the connection' between shaft 39 and crank shaft 59 is severed, due to the fact that the oil within housing 1 is free to flow through the passages 10 and 13, thereby allowing the gears 35 and 36 to freely revolve about or around the gear 42 without imparting any actuating power thereto. By this improved mechanism it is possible and practical to provide any desired ratio between the crank shaft 59 or its equivalent and driven shaft 39.

Thus it will be readily seen that my invention is applicable to any mechanism whatsoever where it is desired to operatively connect and disconnect a driving shaft with a driven shaft, or vice versa, by simple and inexpensive means.

An advantage of this invention is that should the valve bushings 14, or the valves 17, become worn, due to continual use, so

that the fit of the valves within the guideways 9 is impaired, all that is necessary to repair or overcome this defect is to simply remove the worn bushings 14 and replace them by an oversized bushing, thereby enabling the valves 17 to properly and efficiently close the passages 10 and 13, when desired.

Another advantage of this invention over prior devices is that by closing off both ends of the passageways 10 and 13 simultaneously any back lash between crank shaft 59 and driven shaft 39 is avoided should the driven shaft 39 gain momentum and travel faster than driving shaft 59 which would tendto empty the passageways 10 and 13 in the event they were not completely closed off by the sliding valves 17.

It will be understood that certain changes and modifications of the invention can be made without departing from the scope or spirit thereof as defined in the claim.

What I claim as new and desire to secure by Letters Patent is:

A hydraulic rotary power transmitter of o the class described having a cylindrical housing containing a fluid medium such as very thin oil and having a central body portion provided with a plurality of communicating gear chambers with gears in said chambers,

in combination with a plurality of fluid passageways intersecting said body portions and gear chambers, respectively, between the meshed portions of said gears, a plurality of valves for closing each end of each passageway simultaneously to positively trap the Vfluid within said passageways, the openings in said valves at one end of each passageway being smaller in area than the openings in the valves at the other end of each passageway and whereby when said valves are moved so that the opening thereof aline Vith said Huid passageways said Huid is permitted to freely flow therethrough and whereby when said openings in said valves are moved out of registry with said passageways said Huid is trapped within said passageways and prevented from entering or leaving said passageways at either end thereof, substantially as set forth and for the purposes specified.

WILLIAM W. BAKER. 

